A lack of blood circulation in some regions of the body causes erectile dysfunction. And it is for this reason that Vidalista was created. Vidalista 40 mg the enzyme acts by inhibiting PDE-5, which is abundant inside the penis in the form of generic Cialis. In the body, phosphodiesterase. Tadalafil, when combined with sexual excitation during physical intercourse, aids in the achievement and maintenance of blood flow to the penis.